Includes a total of 118 poems, including unexplored works produced by Yoshii Lovinson and Kazuya Yoshii as solo. The culmination of 20 years.

The lyrics of the song released from 2003 to 2023 as "Solo" by Yoshii Lovinson and Kazuya Yoshii. This is a permanent preservation version of a hardcover that contains a total of 118 poems including unpublished works, including the original draft of the handwritten lyrics spelled in the notebook, the background and feelings of the production, as well as comments from the person.

◾️Excerpt from personal comment (recorded in the book)
「BEAUTIFUL」
I wrote while walking around Komazawa Park, the neighborhood of the apartment where I lived alone at that time. This "grainland" was the same place as the scenery where the young grass that appeared later in "Mirai no Uta" grew.

「STRONGER」
When I went abroad, there were children singing hymns in a large church, and I took a video with such beauty. At the end of the song, the sound of that time was sampled. Wonder and key matched.